Chapter Notes›Class 12 Political Science

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Class 12 Political ScienceChapter Notes

4 chapters · Definitions, key points, formulas & exam tips · Updated 2025-26

Ch 1

Cold War and Non-Alignment

Key Definitions

Cold War: The ideological and geopolitical rivalry between the USA and USSR (1947–1991). Characterised by arms race, proxy wars, and political tension — not direct military confrontation.

Non-Alignment: India's foreign policy of not joining either the US-led (NATO) or Soviet-led (Warsaw Pact) bloc during the Cold War.

NAM: Non-Aligned Movement — founded 1961, Belgrade. India's Nehru, Yugoslavia's Tito, Egypt's Nasser, Ghana's Nkrumah, Indonesia's Sukarno were founders.

Key Points to Remember

→Cold War origins: post-WWII ideological divide — USA (capitalism, democracy) vs USSR (communism, one-party state).
→Key crises: Berlin Blockade 1948–49, Korean War 1950–53, Cuban Missile Crisis 1962 (closest to nuclear war).
→Cuban Missile Crisis: USSR missiles in Cuba, 13-day standoff — JFK and Khrushchev. Ended with Soviet missile removal and US pledge not to invade Cuba.
→Arms race: both sides developed nuclear weapons. Concept of MAD (Mutually Assured Destruction) = deterrence.
→NAM principles: peaceful coexistence, oppose colonialism and imperialism, oppose military blocs, peaceful settlement of disputes.
→Non-Alignment ≠ neutrality: India took positions on issues (opposed apartheid, colonialism) but did not join military blocs.
→India's interest in NAM: maintain autonomy, get aid from both blocs, maximise bargaining power.

Exam Tips

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Common confusion: Cold War was not a 'cold' war — it included proxy wars (Korea, Vietnam).

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NAM founders are often asked in MCQs: PENNI — Pakistan (no!), Egypt (Nasser), Nigeria (no), Nehru (India), Indonesia (Sukarno), Yugoslavia (Tito), Ghana (Nkrumah).

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Distinguish Cold War phase 1 (intense, 1947–63) and détente (relaxation, 1963–79) and second Cold War (1979–91).

Ch 2

Emergency and Challenges to Indian Democracy

Key Definitions

Emergency: Suspension of normal democratic processes under Article 352. Declared June 25, 1975 by Indira Gandhi. Lasted until March 1977.

JP Movement: Movement led by Jayaprakash Narayan in 1974–75 demanding 'Total Revolution' against corruption and misrule in Bihar and nationally.

Key Points to Remember

→Background: JP Movement against Indira government → Allahabad High Court (June 12, 1975) found Indira Gandhi guilty of electoral malpractice → threatened her prime ministership.
→Emergency declared June 25, 1975 under Article 352 (internal disturbance clause).
→Measures during Emergency: preventive detention under MISA, press censorship, suspension of Fundamental Rights (Article 19), arrest of opposition leaders, 42nd Amendment.
→Elections of 1977: Janata Party formed — defeated Congress. Morarji Desai became PM. First non-Congress government.
→Shah Commission (1977): investigated Emergency excesses — found abuses of power, forced sterilisation, demolition drives in Delhi.
→Lessons: Emergency showed fragility of Indian democracy and importance of free press, judiciary, civil society.
→Restoration: Janata government restored civil liberties, freed political prisoners, passed 44th Amendment (made Emergency harder to impose).

Exam Tips

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Year accuracy: Emergency 1975–77, NOT 1975–76. Elections held in March 1977.

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For 6-mark question: background → declaration → measures → elections → lessons.

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MISA = Maintenance of Internal Security Act — used for preventive detention during Emergency.

Ch 3

Challenges of Nation Building and External Relations

Key Definitions

Princely States: Over 500 semi-autonomous states under British paramountcy that had to choose between India and Pakistan at independence.

Panchsheel: Five principles of peaceful coexistence agreed between India and China in 1954: sovereignty, non-aggression, non-interference, equality, peaceful coexistence.

Key Points to Remember

→Three challenges at independence: (1) Partition and refugee rehabilitation, (2) Integration of 500+ princely states, (3) Reorganisation of states on linguistic basis.
→Sardar Patel's role: political integration of princely states using diplomacy and force (Hyderabad — Operation Polo, 1948).
→States Reorganisation Commission (1953): recommended linguistic basis for state formation. Andhra Pradesh first linguistic state (1953), States Reorganisation Act 1956.
→India-China: Panchsheel (1954) → border dispute → Sino-Indian War 1962 (India lost) → cooling of relations → Pokhran tests 1974 drew Chinese criticism.
→India-Pakistan: Partition violence → Kashmir dispute → 1965 War (Tashkent Agreement) → 1971 War (Bangladesh Liberation, Shimla Agreement) → nuclear tests 1998.
→Nuclear policy: Pokhran I (1974, Indira) showed nuclear capability. Pokhran II (1998, Vajpayee) — India declared itself nuclear weapon state.
→Non-Alignment: enabled India to maintain independence in foreign policy and get aid from both blocs.

Exam Tips

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Kashmir dispute origin: Maharaja Hari Singh signed Instrument of Accession to India (Oct 1947) after Pakistani tribal invasion.

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Hyderabad integration: 'Operation Polo' was the police action (September 1948) — not a war.

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1971 war outcome: Bangladesh created, Simla Agreement — bilateral resolution of disputes between India and Pakistan.

Ch 4

Recent Developments — Coalition Era and Mandal

Key Definitions

Coalition Government: Government formed by alliance of multiple political parties when no single party wins majority. Common in India from 1989.

Mandal Commission: Backward Classes Commission headed by B.P. Mandal (1979). Recommended 27% reservation for OBCs in central government jobs. Implemented 1990 by V.P. Singh.

Key Points to Remember

→Congress dominance ended: 1989 elections — VP Singh's National Front came to power. First non-Congress government at national level since 1977 Janata.
→VP Singh implemented Mandal Commission: protests, counter-protests (anti-Mandal movement), BJP withdrew support after Advani's Rath Yatra.
→Rise of BJP: Ram Janmabhoomi movement, Advani's Rath Yatra (1990), 1992 Babri Masjid demolition — nationwide communal violence.
→Coalition era: every government from 1989–2014 was a coalition — NDA, UPA, United Front — gave regional parties national importance.
→Economic liberalisation 1991: PV Narasimha Rao + Manmohan Singh — LPG reforms (Liberalisation, Privatisation, Globalisation) in response to forex crisis.
→UPA 2004–2014: Congress-led coalition under Manmohan Singh. RTI, NREGA, MGNREGS social programmes.
→NDA 2014: BJP won absolute majority — end of coalition era temporarily.

Exam Tips

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Mandal controversy: who supported (backward classes), who opposed (upper castes, students who self-immolated), what happened (VP Singh fell).

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Coalition politics key feature: regional parties (TMC, SP, RJD, DMK) became kingmakers.

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1991 economic reforms: India opened to foreign investment, reduced import tariffs, privatised PSUs.

Frequently Asked Questions

Are these notes based on 2025-26 CBSE syllabus for Class 12 Political Science?

Yes. All chapter notes here are based on the latest 2025-26 CBSE syllabus for Class 12 Political Science. Deleted topics are clearly marked so you focus only on what will be tested in your board exam.

How to study Class 12 Political Science notes effectively for board exams?

Read each chapter's notes once to build understanding. Then close the notes and try to recall every key point, definition, and formula from memory. Anything you miss is your weak area — revisit only those points. This active recall method takes less time and retains far more than re-reading.

What is the difference between NCERT notes and chapter summaries?

Chapter notes contain detailed definitions, key terms, formulas, and concept breakdowns — they're for learning and understanding. Chapter summaries are shorter paragraph-style overviews — they're for quick revision. Use notes when you're studying a chapter for the first time; use summaries the night before the exam.

Do I need to memorise formulas for Class 12 Political Science CBSE board exam?

Yes. Formulas listed in these notes must be memorised precisely — CBSE doesn't give formula sheets during exams. Write each formula 5–10 times, then recall it without looking. In the exam, write the formula first, then substitute values — this helps you earn partial marks even if the final answer has a calculation error.

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